Ok, first impressions of 1.92 as the Greeks (again) on the "normal" map.
The early game plays out very much like it did in previous versions, the AI is more aggressive and I saw a first today, the AI (Decebal) declared war on me first. Not by much though, he declared war on me the same turn I was going to declare war on the Illyrians (which I still did anyway). However, by 1AD there were still no AI vs. AI wars and most of the world was pleased with each other, they just didn't like me as usual. I was still able to knock Teutra out of the game, this time at about 1250BC and I pillaged enough gold to keep me running at 100% research despite the -30 gold per turn my army was costing me. The war with Decebal was really little more than an inconvienence. The change in engineers allowed by the smithy didn't have any effect on the insane number of great engineers I ended up with, so I was able to rush the Sphynx, Great Lighthouse and Riches of Kroisos.
Attacking cities is significantly more difficult now and the AI defends them (in most cases) with more than a pair of archers and a javelin, although those are still the most common defenders early in the game. They did try to attack me with a good mix of skirmishers & spearmen and Decebal managed to take one of my newly captured cities for a turn since I gambled and took it with the last unit in the stack.
Archers feel a bit better, they're still pretty "craptacular" as city defenders, easily defeated by just about anything but the increased challenge in assulting cities makes their collateral damage more useful when attacking.
The Axemen still feel useless when playing as the Greeks. When produced with no promotions they are weaker city attackers than armored spearmen (with the free Combat 1 promotion). The 25% bonus they get is negated by the fact that armored spearmen are essentially 30% stronger (again with free Combat 1). The City Raider promotion(s) gives them a nicer bonus but since that only helps them in the specific instance of attacking a city the extra 15% over additional Combat promotions for armored spearmen is limited. So, in the case of the greeks there is still little reason to build anything other than Hoplites & Armored Spearmen for attack stacks. I would imagine it would feel similar with any other civ getting a free combat 1 promotion for heavy units.
In general I suffered more losses than I would in 1.9, particularly when taking cities when they were garrisoned with defenders better than archers. The increased unit maintenance costs make it considerably tougher to stay on top of the power chart.
The changes to religion seem to have made religion fairly insignificant. I don't know how the effects on diplomacy works now since none of them spread to any degree. It was nice to see a lot of players with no state religion rather than everybody using the same one or two (depending on who built their shrine first).
I don't know if the commerce changes or the unit upkeep changes had a bigger effect on the game. I never used merchant vessels before because they didn't feel worth it and since their return has dropped even more I didn't try them this time around.